Book/Report

FZJ-2017-02916

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Comparative interpretation of absorption spectra of technetium(IV) and rhenium(IV) hexahalides

Klixbüll Jörgensen, C. ; Schwochau, K.FZJ*

1965
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/14166

Report No.: Juel-0243-RC

Abstract: Absorption spectra of aqueous solutions of TcX$_{6}^{--}$ and $ReX_{6}^{--}$ (X=F, Cl, Br, I) are measured between 8 000 and $\thicksim$ 50 000 cm$^{-1}$ and theoretically discussed. The electron transfer spectra indicate the optical electronegativity $x_{opt}$=2.25 for Tc (IV) and 2.05 for the less oxidizing Re (IV). The spectrochemical parameter L1 is determined to 28 400 cm$^{-1}$ in $TcF_{6}^{-}$ and 32 800 cm$^{-1}$ in $ReF_{6}^{--}$. The nephelauxetic effect is evaluated from the spin-forbidden intra-sub-shell transitions in all eight species, and from the two spin-allowed bands of $TcF_{6}^{--}$. The vibrational structure of the narrow absorption bands and the possible weak distortion from octahedral symmetry of Tc (IV) hexahalides are discussed.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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